I love the history of forecasts about controlled fusion power. In the 60s physicists (notably Teller and Dyson) often claimed it was 20 years away. In the 70s it was 25 years away. In the 80s it was 30 years away. In the 90s it was 40 years away. Last I heard (2005 or so), it was 50 years away. Perhaps we should stop funding research into controlled fusion power before it gets any further away.